143413221 has 32 divisors (see below), whose sum is σ = 225495040. Its totient is φ = 79361856.

The previous prime is 143413217. The next prime is 143413243. The reversal of 143413221 is 122314341.

143413221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 143413221 - 2² = 143413217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143413261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294240 + ... + 294726.

It is an arithmetic number, because the mean of its divisors is an integer number (7046720).

Almost surely, 2^143413221 is an apocalyptic number.

It is an amenable number.

143413221 is a deficient number, since it is larger than the sum of its proper divisors (82081819).

143413221 is a wasteful number, since it uses less digits than its factorization.

143413221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913.

The product of its digits is 576, while the sum is 21.

The square root of 143413221 is about 11975.5259174702. The cubic root of 143413221 is about 523.4353670266.

Adding to 143413221 its reverse (122314341), we get a palindrome (265727562).

The spelling of 143413221 in words is "one hundred forty-three million, four hundred thirteen thousand, two hundred twenty-one".